https://docs.cloud.google.com/appengine/docs/standard/python3/reference/services/bundled/google/appengine/datastore/datastore_stub_util/BaseIndexManager
google.appengine.datastore.datastore_stub_util.BaseIndexManager | App Engine standard environment |...
A generic index manager that stores all data in memory.
app enginegoogleappenginedatastorestub